// After instantiation, Gauss objects can be conveniently used like any Array

numbers[0]=2;

set[1]=7;

Note: To prevent unintended scope/prototype pollution, Gauss versions after 0.2.3 have removed support for monkey patching the native Array data type.
Use the .toArray() method of any Gauss object to a convert to a vanilla Array.

To experiment with Gauss or to quickly start a Node.js command-line environment for number crunching, Gauss ships with a lightweight REPL (Read–eval–print loop). Start the REPL with npm start within the source directory, or gauss if installed globally (via npm install -g gauss).

For example, using the help() function and analyzing a data file from the Gauss REPL: